The 33-year-old actress, who plays barmaid Michelle Connor on the ITV1 show, confirmed that she is eager to celebrate the programme's milestone in late 2010.
Speaking to the Chester Chronicle, Marsh explained: "I'm contracted until at least next June. By then I will have done four years, and of course we've got the 50th anniversary coming up next year.
"Hopefully I'll be a big part of that. Fingers crossed, I'd really like to be. I'd love to still be there for that."
On the Weatherfield's drama's future, she added: "We'll keep making people laugh. I think that's the beauty of Corrie, isn't it?"
Earlier this month, former Street star Kevin Kennedy (Curly Watts) claimed that producers want to bring back a number of old faces for the anniversary. However, show bosses have insisted that it is "too early" to confirm any plans for the occasion.